Here are the most reliable mobile apps commonly used in Sri Lanka to pay utility bills (electricity, water, telco, internet, etc.), with a short note about why each is dependable and what they typically cover.

Top choices — what to try first

• ComBank Q+ (Commercial Bank) — In‑app bill payments (CEB/LECO, water, telco, pay-TV, etc.), card or account debit, recurring/favourites, LankaQR support and wide bank-level security. Good if you already bank with Commercial Bank. (combank.lk)

• HNB SOLO (Hatton National Bank) — Full-featured mobile banking app that supports payments to many utility billers, biometric login and biller validation; reliable for users with HNB accounts or cards. (brandradar.org)

• Sampath / Sampath Mobile / WePay (Sampath Bank) — Sampath’s mobile and digital wallet options support utility and telecom bill payments, LankaQR and saved payees for repeat bills. Good if you use Sampath Bank. (brandradar.org)

Popular non-bank wallets & aggregator apps

• genie (Dialog Axiata) — A widely used digital wallet/fintech app that supports CEB/LECO/Water bill payments, frequent promotions/discounts, card linking and in‑app biller features. Works well across mobile networks. (genie.lk)

• eZ Cash (Dialog) / mCash (Mobitel) — Mobile‑wallet services historically tied to Dialog/Mobitel that offer utility bill payments (CEB, water, LECO) and extensive retail agent networks — useful if you prefer wallet-based payments. (ezcash.lk)

Biller-specific/government apps (useful if you want direct service-provider control)

• CEB Care (Ceylon Electricity Board) — Official CEB app to view and pay electricity bills directly, track usage and receive outage/notification updates. Use this for direct payments to the electricity board. (gazette.lk)

How to pick the most reliable for you

• If you prefer bank-level security and one app for multiple utilities, use your bank’s mobile app (ComBank Q+, HNB SOLO, Sampath, etc.). (combank.lk)
• If you want wallet features, promos or telecom-linked benefits, use genie, eZ Cash or mCash. (genie.lk)
• For electricity specifically, the CEB Care app gives direct account control and official notifications. (gazette.lk)

Notes on security and reliability

• Prefer apps from established banks or telecom providers (they use stronger authentication and are LankaQR / regulator-compliant).
• Save payee/account numbers only in apps you trust; enable biometric/PIN protection.
• Check recent app reviews and version-update dates in Google Play / App Store before installing (app performance can change over time).

If you’d like, I can:

• list direct Play/App Store names/links for each app (I’ll fetch the current store pages), or
• make a short comparison table (fees, typical billers supported, promo examples).